Need help on String Trimming Java

Question

I am getting this string from Db

str = "External - Internal ";

I want to remove the last whitespace from the string. I have already tried string.trim() and assigned it to another string Kindly suggest as this is just not working. below is my code for reference.

 public static void main(String args[]){
      String str = "External - Internal ";

      String temp = str.trim();
      System.out.println("1"+temp);
      temp=str.replaceAll(" ", "");
      System.out.println("2"+temp);
      temp=str.replace("\\r", "");
      System.out.println("3"+temp);
   }

Regards Abhi

whats the issue with `trim()` it [worked](http://ideone.com/1ADa1p) for me — singhakash, Mar 23 '15 at 12:52

Avinash Raj · Answer 1 · 2015-03-23T12:52:16.433

0

You could do this simply through string.replaceAll or string.replaceFirst function.

string.replaceAll("\\s(?=\\S*$)", "");

If you exactly mean the space which was at the end then use the below regex.

string.replaceAll("\\s$", "");

Use \\s+ instead of \\s if you want to deal with one or more spaces.

edited Mar 23 '15 at 12:52

answered Mar 23 '15 at 12:47

Avinash Raj

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or `string.replaceFirst("\\s(?=\\S*$)", "");` – Avinash Raj Mar 23 '15 at 12:51
Thanks All for your promt response, – user4703055 Mar 23 '15 at 13:30
just want to confirm replaceAll("\\s(?=\\S*$)", "") if it removes only the whitespaces at the end. Please confirm – user4703055 Mar 23 '15 at 13:31
yep, it removes the last whitespace ie, in this input `foo bar bux`, this would also remove the space before `bux`. If you want to remove the space which was at the end, then use `\\s$` – Avinash Raj Mar 23 '15 at 13:34
tried both the options suggested by you, but space is not removed. kindly suggest – user4703055 Mar 23 '15 at 13:39
it works for me. Just assign the result to another variable and then print that variable. – Avinash Raj Mar 23 '15 at 13:40
Surprising how it is working with trim, as even I tried assigning it to another variable, I have found a way to handle it, but still looking for a neat way of doing this. – user4703055 Mar 23 '15 at 14:19
try `string.replaceAll(" (?=\\S*$)", "");` – Avinash Raj Mar 23 '15 at 14:21
I am using below code for now public static void main(String args[]){ String str = "External - Internal "; System.out.println("+"+str.substring(str.length()-1)); if(str.substring(str.length()-1).equals(" ")){ str = str.replace(str.substring(str.length()-1), ""); System.out.println(""+str); } } – user4703055 Mar 23 '15 at 14:21

score 0 · Answer 2 · edited May 23 '17 at 11:43

0

You can find your answer here Strip Leading and Trailing Spaces From Java String

Look at the top two answers. Try right trim as myString.replaceAll("\s+$", "");

edited May 23 '17 at 11:43

Community

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answered Mar 23 '15 at 12:53

Abdul Rehman Yawar Khan

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already tried it, not working in case of my string, I suspect it is normal space, so given a try for carriage return and tabs but that too not giving expected result :( – user4703055 Mar 23 '15 at 13:57

Need help on String Trimming Java

2 Answers2